Betting it all on Tesla Motors Inc. certainly brings out plenty of naysayers.

Last week MoneyBeat profiled Sam Cornwell, a 32-year-old student in the United Kingdom with a wife and a 10-month-old son, who said he invested his personal life savings — about $25,000 — in Tesla back in September when the stock was trading at about $27.50 a share. The column brought out plenty of critics, especially since the stock is now trading above $90.

Analysts are mixed on Tesla’s future. Earlier this month the electric-car maker reported its first-ever quarterly profit, a stark contrast from six months earlier when it was on the verge of a liquidity crisis. Last week Tesla raised more than $1 billion in new capital, which it will use to pay off a $452.4 million federal loan and embark on other endeavors.

Morgan Stanley is about as bullish as one could be on Tesla. The firm last week upped its price target to $109 from $103 and compared CEO Elon Musk to Thomas Edison. Conversely Bank of America kept its $37 price target on Tesla late last week, claiming shares are “vastly overvalued” and that they will revert back to previous levels once momentum wanes. The firm has expressed concerns about Tesla’s ability to hit its 25% gross margin target. It also predicts Tesla is much less likely to be considered a takeover target following the stock’s big rally.

With that context in mind, MoneyBeat elected to give Cornwell a chance to respond to his critics. Here’s what he said in an email over the weekend:

I bought Tesla for the long haul. I’m not investing to make a quick buck, I’m investing because I really, really believe in what Tesla is doing. I wanted to own a piece of a company that will, in my opinion, change the world for the better within a decade, just like (a reference almost becoming a cliche) Apple Inc. did in 2007 with the iPhone. For me that was the most important part of the purchase. Call me old fashioned, but I bought shares in Tesla because I wanted to own Tesla! Studying charts, earnings, financials, history were all important aspects when considering whether or not to buy, but the fundamental goals and belief I had for Tesla came first. Shouldn’t this be the case for any stock you buy?

Consider the market as it is today. Cars are all run on diesel or petrol. They smell, they pollute, they are positively disgusting. You have to visit a station and pay an extraordinary amount of money to drive another 500 miles. Have you ever changed the oil in your car? The funny thing is – we’re all used to it and we think it’s normal. Shouldn’t normal be the Tesla Model S? A clean, reliable, cost effective vehicle. After several long discussions with friends and family who are admittedly petrol heads, they can’t say anything against what Tesla is doing, apart from “I’ll miss the smell or the noise.”

The Wells Fargo financing has brought the cost down for consumers to $800 a month with a guaranteed sale price higher than any equivalent vehicle after the lease is up. It may be a premium car, but it’s already starting to sound a lot cheaper than an M6, A7 or Merc equivalent. Need I mention Consumer Reports or Motor Trend? How about we consider the last time a start up car company turned a profit? You’ll need to look back 60 years to Lamborghini. That is incredible! And all of this with $0 spent on advertising.

Future: Model X coming in 2014. Europe deliveries starting in 2014. Gen III arriving within 3 years. A sub $40,000 model. Hints of a 500 mile battery. The list of positive attributes about the company go on.

There are some things that are of genuinely concern for the future: Elon Musk selling up to concentrate on SpaceX prior to mass market implementation. The price of Lithium increasing.

And when will I sell? Sometime after Tesla has reached mass market production and has become a household name. 5-10 years. In the mean time the price will go up, down and sideways, but I won’t let the day traders goad me into selling.

To MoneyBeat nation, what do you guys think of Cornwell’s reasoning and logic behind holding the stock for the long term? Do you agree? Disagree? Drop your feedback in the comments section below. We’d love to hear from you.